Power driven compressor system for vehicles

ABSTRACT

A power driven compressor system for vehicle includes: a housing, formed with a driving circuit accommodating room; a transmission set disposed in the housing and driven by electrical power to produce a rotating magnetic for rotating a transmission axle; a scroll set comprised of a static scroll and a orbiting scroll. The orbiting scroll is driven by the transmission axle to rotate eccentrically with respect to the static scroll. An Oldham ring is disposed between the orbiting scroll and the housing. The Oldham ring has a cross-like limiting part. A concave part corresponding to the limiting part is formed on the housing and the orbiting scroll to limit the motion of the orbiting scroll.

BACKGROUND OF THE INVENTION

1. Field of Invention

The invention relates to a compressor and, in particular, to a powerdriven compressor system for vehicles.

2. Related Art

A normal vehicle compressor system utilizes the power of gas engine forits operation. However, in view of the rising oil price and limitednatural resources, all carmakers have been trying to develop electriccars. Therefore, it is a natural trend for vehicle compressor systems touse electrical power.

Nevertheless, current power driven compressor systems (e.g., those inrefrigerators) cannot be directly used in vehicles. The reason is asfollows.

Ordinary home electronic compressor systems are formed with a room forholding coolant oil at their bottom. When the compressor is running, thecoolant oil is simultaneously sucked up to lubricate the internalcomponents of the compressor. Therefore, the home electronic compressorscan only run is a static environment. This is to prevent damages if thecoolant oil cannot be sucked up and the lubrication is not enough. Sincerunning vehicles must have vibrations, home electronic compressorsystems cannot be applied to vehicles.

Moreover, as the environmental temperature due to the vehicle operationis higher, the compressor motor tends to overheat and lowers itsefficiency. The high environmental temperature also has the problem ofcircuit damages in the compressor system.

SUMMARY OF THE INVENTION

An objective of the invention is to provide a power driven compressorsystem for vehicles. The compressor is completely driven by electricalpower. During its operation, the compressor has a better cooling effect.

To achieve the above objective, the disclosed compressor systemincludes: a housing, a transmission set, and a scroll set.

The housing consists of a bottom cover and an end cover. The bottomcover has an air inlet. The end cover has an air outlet. The end coveris further formed with a driving circuit accommodating room in fluidcommunications with the end cover.

The transmission set is disposed in the bottom cover. It includes atransmission axle, a rotor connected on the transmission axle, and astator around the rotor. The transmission set is driven by electricalpower to produce a rotating magnetic field. The rotor thus rotates thetransmission axle.

The scroll set is disposed in the end cover. It consists of a staticscroll and an orbiting scroll. The orbiting scroll connects to thetransmission axle, and rotates eccentrically with respect to the staticscroll for compression. An Oldham ring is disposed between the orbitingscroll and the bottom cover. The Oldham ring has a cross-like limitingpart. A concave part corresponding to the limiting part is formed on thebottom cover and the orbiting scroll to limit the motion of the orbitingscroll.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will become more fully understood from the detaileddescription given herein below illustration only, and thus is notlimitative of the present invention, and wherein:

FIG. 1 is a three-dimensional exploded view of the invention;

FIG. 2 is a three-dimensional view of the invention after assembly; and

FIG. 3 is a cross-sectional view of the invention after assembly.

DETAILED DESCRIPTION OF THE INVENTION

The present invention will be apparent from the following detaileddescription, which proceeds with reference to the accompanying drawings,wherein the same references relate to the same elements.

First, please refer to FIGS. 1 to 3 for the power driven compressorsystem for vehicles according to the invention. It includes a housing11, a transmission set 21, and a scroll set 31.

The housing 11 consists of a bottom cover 12 and an end cover 13. Thebottom cover 12 has an air inlet 14. The end cover 13 has an air outlet15. The bottom cover 12 is fonned with a driving circuit accommodatingroom 16 in communications with the interior thereof and having an openend 161. A sideboard 17 correspondingly covers the open end 161 of thedriving circuit accommodating room 16, blocking its communications withthe external space. Two opposite concave parts 121 are formed around theopen end of the bottom cover 12.

The transmission set 21 is disposed in the bottom cover 12. It includesa transmission axle 22, a rotor 23 connected on the transmission axle22, and a stator 24 disposed around the rotor 23. The coil of thetransmission set 21 is made of an enamel-insulated wire. The stator 24is fixed on the inner wall of the bottom cover 12. The driving end ofthe transmission axle 22 is disposed eccentrically with a bearing 25.The rotor 23 is driven by the rotating magnetic field produced by thepower driven stator 24 to rotate the transmission axle 22.

The scroll set 31 is disposed in the end cover 13. It consists of astatic scroll 32 and an orbiting scroll 33. The two scrolls 32, 33 havematching spiral inner walls so that a compression space 34 is formed inbetween. The bottom end of the orbiting scroll 33 connects to thebearing 25 on the driving end of the transmission axle 22. The orbitingscroll 33 thus orbits eccentrically with respect to the static scroll32. As the orbiting scroll 33 orbits around the static scroll 32, thevolume of the compression space 34 changes to compress the workingfluid. Moreover, the bottom end of the orbiting scroll 33 has twoopposite concave parts 331. A limiting plate 35 and an Oldham ring 36are disposed between the orbiting scroll 33 and the bottom cover 12. TheOldham ring 36 has a cross-like limiting part 361 to be accommodated inthe orbiting scroll 33 and the concave parts 331, 121 of the bottomcover 12. With the concave parts 331, 121, the motion of the limitingpart 361 of the Oldham ring 36 is restricted, which in turn limits themotion of the orbiting scroll 33. Its eccentric orbiting radius isrestricted within a predetermined value.

During actual operations, electrical power directly drives thetransmission set 21. The transmission set 21 sucks a working fluid,which is a mixture of low-pressure coolant and coolant oil, into thebottom cover 12 via the air inlet 14 on the bottom cover 12 and fillsit. In addition to effectively cooling and lubricating the transmissionset 21 in the bottom cover 12, the circuit in the driving circuitaccommodating room 16 is also cooled as the driving circuitaccommodating room 16 is in fluid communications with the bottom cover12. The working fluid in the interior of the bottom cover 12 is suckedby the eccentric orbiting of the orbiting scroll 33 into the compressionspace 34 between the orbiting scroll 33 and the static scroll 32. Theworking fluid compressed to high pressure passes through a valve 37composed of reeds, and leaves via the air outlet 15 of the end cover 13for external uses. Of course, the working fluid sucked in by the scrollset 31 can simultaneously cool and lubricate the internal components ofthe end cover 13.

The invention has the following advantages:

1. The invention uses a working fluid which is a mixture of low-pressurecoolant and coolant oil. Therefore, the disclosed compressor system canbe used in a vehicle and a non-static environment. When the transmissionset 21 is driven by electrical power, the working fluid enters thecompressor via the air inlet 14 of the bottom cover 12. The componentsin the compressor is both cooled and lubricated at the same time. Thiscan reduce damages to the compressor motor.

2. The driving circuit accommodating room 16 formed on the bottom cover12 is in communications with the bottom cover 12. When the working fluidenters the bottom cover 12, the circuits in the driving circuitaccommodating room 16 can be also cooled. This reduces the possibilityof overheating on the circuits.

3. An Oldham ring is disposed between the orbiting scroll 33 and thebottom cover 12. The cross-like limiting part 361 on the Oldham ring 36are correspondingly accommodated in the concave parts 121, 331 on thebottom cover 12 and the orbiting scroll 33. The concave parts 121, 331can limit the motion of the limiting part 361 on the Oldham ring 36. Theorbiting scroll 33 is thus restricted to orbit within a predeterminedeccentric orbiting radius.

Although the invention has been described with reference to specificembodiments, this description is not meant to be construed in a limitingsense. Various modifications of the disclosed embodiments, as well asalternative embodiments, will be apparent to people skilled in the art.Therefore, it is contemplated that the appended claims will cover allmodifications that fall within the true scope of the invention.

1. A power driven compressor system for vehicles, comprising: a housing,which consists of a bottom cover and an end cover, the bottom coverbeing fonned with an air inlet, the end cover being formed with an airoutlet, and the end cover being further fonned with a driving circuitaccommodating room in fluid communications with the end cover; atransmission set, which is disposed in the bottom cover and includes atransmission axle, a rotor connected on the transmission axle, and astator disposed around the rotor, the transmission set being driven byelectrical power to generate a rotating magnetic field so that the rotordrives the transmission axle to rotate concurrently; and a scroll set,which is disposed in the end cover and consists of a static scroll andan orbiting scroll, the orbiting scroll connecting to the transmissionaxle and orbiting eccentrically with respect to the static scroll toprovide a compression effect; wherein an Oldham ring is disposed betweenthe orbiting scroll and the bottom cover, the Oldham ring has across-like limiting part, and concave parts corresponding to thelimiting part are formed on the bottom cover and the orbiting scroll torestrict the motion of the orbiting scroll.
 2. The power drivencompressor system for vehicles of claim 1, wherein the bottom cover hasan open end, and a side board correspondingly covers the open end of thedriving circuit accommodating room to block the communication betweenthe driving circuit accommodating room and the external space.
 3. Thepower driven compressor system for vehicles of claim 1, wherein the coilin the transmission set is made of an acid- and alkaline-proofenamel-insulated wire.
 4. The power driven compressor system forvehicles of claim 1, wherein the stator is fixed on the inner wall ofthe bottom cover, a bearing is disposed eccentrically on the driving endof the transmission axle, and the bottom end of the orbiting scrollconnects to the bearing on the driving end of the transmission axle. 5.The power driven compressor system for vehicles of claim 1, wherein thetransmission set sucks in a working fluid, which is a mixture of alow-pressure coolant and coolant oil, via the air inlet on the bottomcover.
 6. The power driven compressor system for vehicles of claim 1,wherein the open end of the bottom cover is formed with two oppositeconcave parts and the bottom end of the orbiting scroll is formed withanother two opposite concave parts, the cross-like limiting part on theOldham ring is accommodated in the concave parts, the concave partsrestrict the motion of the limiting part on the Oldham ring, therebyrestricting the orbiting scroll to orbit within a predeterminedeccentric orbiting radius.